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Gadolinium vs Chromium

Gadolinium
Chromium
Chromium vs Gadolinium


Periodic Table
Symbol
Gd   
Cr   
Group Number
0   
18
6   
12
Period Number
6   
4   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440542   
33
7440473   
39
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • Gadolinium is not found free in nature, hence it is not a native metal.
  • Gadolinium metal found in minerals like Monazite and Bastnaesite.
  
  • Chromium is highly reactive, hence it is not found free in nature.
  • Ores of Chromites mineral are the major source of Chromium metal.
  • Almost 90% leather tanning is done with the help of chromium.
  
Sources
Found in Minerals, Mining   
Found in Minerals, Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Jean Charles Galissard de Marignac   
Louis Nicolas Vauquelin   
Discovery
In 1880   
In Between 1797 - 1798   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
1.5 * 10-3 %   
7
Abundance In Sun
~0.0000002 %   
25
~0.002 %   
7
Abundance In Meteorites
0.00 %   
34
0.30 %   
7
Abundance In Earth's Crust
0.00 %   
30
0.01 %   
13
Abundance In Oceans
0.00 %   
38
0.00 %   
16
Abundance In Humans
Not Available   
0.00 %   
16
Uses
Uses & Benefits
  • Its alloys are also used in making Magnets, electronic components and Data storage devices.
  • Compound of Gadolinium metal are used in magnetic resonance imaging (MRI).
  
  • It is used to harden the steel and produces a stainless steel and other various alloys.
  • It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry   
Automobile Industry, Chemical Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Highly Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.11 Blood/mg dm-3   
12
In Bone
Not Available   
0.33 p.p.m.   
21
Physical Properties
Melting Point
1,311.00 °C   
35
1,857.00 °C   
14
Boiling Point
3,233.00 °C   
25
2,672.00 °C   
39
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silver   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
8.50   
1
Brinell Hardness
Not Available   
687.00 MPa   
16
Vickers Hardness
510.00 MPa   
22
1,060.00 MPa   
10
Speed of Sound
2,680.00 m/s   
34
5,940.00 m/s   
5
Optical Properties
  
  
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Gd   
Cr   
Isotopes
  
  
Known Isotopes
26   
13
21   
18
Electronegativity
  
  
Pauling Electronegativity
1.20   
39
1.66   
18
Sanderson Electronegativity
Not Available   
1.66   
14
Allred Rochow Electronegativity
1.11   
29
1.56   
10
Allen Electronegativity
Not Available   
1.65   
19
Electropositivity
  
  
Pauling Electropositivity
2.80   
15
2.34   
36
Ionization Energies
  
  
1st Energy Level
593.40 kJ/mol   
99+
26,130.00 kJ/mol   
1
2nd Energy Level
1,170.00 kJ/mol   
99+
28,750.00 kJ/mol   
1
3rd Energy Level
1,990.00 kJ/mol   
99+
34,230.00 kJ/mol   
1
4th Energy Level
4,250.00 kJ/mol   
30
37,066.00 kJ/mol   
1
5th Energy Level
Not Available   
97,510.00 kJ/mol   
1
6th Energy Level
Not Available   
105,800.00 kJ/mol   
1
7th Energy level
Not Available   
114,300.00 kJ/mol   
1
8th Energy Level
Not Available   
125,300.00 kJ/mol   
1
9th Energy Level
Not Available   
134,700.00 kJ/mol   
1
10th Energy Level
Not Available   
144,300.00 kJ/mol   
1
11th Energy Level
Not Available   
26,130.00 kJ/mol   
12
12th Energy Level
Not Available   
28,750.00 kJ/mol   
13
13th Energy Level
Not Available   
34,230.00 kJ/mol   
10
14th Energy Level
Not Available   
37,066.00 kJ/mol   
12
15th Energy Level
Not Available   
97,510.00 kJ/mol   
1
16th Energy Level
Not Available   
105,800.00 kJ/mol   
2
17th Energy Level
Not Available   
114,300.00 kJ/mol   
3
18th Energy Level
Not Available   
125,300.00 kJ/mol   
4
19th Energy Level
Not Available   
134,700.00 kJ/mol   
5
20th Energy Level
Not Available   
144,300.00 kJ/mol   
7
21st Energy Level
Not Available   
157,700.00 kJ/mol   
7
22nd Energy Level
Not Available   
166,090.00 kJ/mol   
6
Electrochemical Equivalent
1.96 g/amp-hr   
32
0.32 g/amp-hr   
99+
Electron Work Function
3.10 eV   
35
4.50 eV   
14
Other Chemical Properties
Corrosion, Flammable, Ionization, Radioactive Isotopes   
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
64   
99+
24   
99+
Electron Configuration
[Xe] 4f7 5d1 6s2   
[Ar] 3d5 4s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Gadolinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
64   
99+
24   
99+
Number of Neutrons
93   
37
28   
99+
Number of Electrons
64   
99+
24   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
128.00 pm   
99+
Covalent Radius
196.00 pm   
14
139.00 pm   
99+
Van der Waals Radius
237.00 pm   
15
200.00 pm   
28
Atomic Weight
47.87 amu   
99+
52.00 amu   
99+
Atomic Volume
19.90 cm3/mol   
20
7.23 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Europium
  
Vanadium
  
Next Element
Terbium
  
Manganese
  
Valence Electron Potential
46.10 (-eV)   
34
170.00 (-eV)   
4
Lattice Constant
363.60 pm   
32
291.00 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.59   
9
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
7.90 g/cm3   
99+
7.19 g/cm3   
99+
Density When Liquid (at m.p.)
7.40 g/cm3   
31
6.30 g/cm3   
40
Tensile Strength
Not Available   
689.00 MPa   
7
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
30
0.00 (Pa)   
24
Vapor Pressure at 2000 K
7.39 (Pa)   
9
774.00 (Pa)   
1
Elasticity properties
  
  
Shear Modulus
21.80 GPa   
33
115.00 GPa   
9
Bulk Modulus
37.90 GPa   
34
160.00 GPa   
11
Young's Modulus
54.80 GPa   
35
279.00 GPa   
8
Poisson Ratio
0.26   
23
0.21   
32
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.90   
40
7.19   
99+
Magnetic Ordering
Ferromagnetic   
Antiferromagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
NA   
Resistivity
1.31 nΩ·m   
99+
125.00 nΩ·m   
27
Electrical Conductivity
0.01 106/cm Ω   
99+
0.08 106/cm Ω   
25
Electron Affinity
50.00 kJ/mol   
21
64.30 kJ/mol   
15
Thermal Properties
Specific Heat
0.23 J/(kg K)   
27
0.45 J/(kg K)   
12
Molar Heat Capacity
37.03 J/mol·K   
2
23.35 J/mol·K   
99+
Thermal Conductivity
10.60 W/m·K   
99+
93.90 W/m·K   
17
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
9.40 µm/(m·K)   
99+
4.90 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
359.40 kJ/mol   
21
348.80 kJ/mol   
24
Enthalpy of Fusion
10.05 kJ/mol   
36
15.31 kJ/mol   
20
Enthalpy of Atomization
352.00 kJ/mol   
27
397.50 kJ/mol   
21
Standard Molar Entropy
68.10 J/mol.K   
16
23.80 J/mol.K   
99+
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